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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QQMLBOUNDSIGNAL_P_H
#define QQMLBOUNDSIGNAL_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/qmetaobject.h>
#include <private/qqmljavascriptexpression_p.h>
#include <private/qqmlnotifier_p.h>
#include <private/qqmlrefcount_p.h>
#include <private/qtqmlglobal_p.h>
QT_BEGIN_NAMESPACE
class Q_QML_EXPORT QQmlBoundSignalExpression final
: public QQmlJavaScriptExpression,
public QQmlRefCounted<QQmlBoundSignalExpression>
{
friend class QQmlRefCounted<QQmlBoundSignalExpression>;
public:
QQmlBoundSignalExpression(
const QObject *target, int index, const QQmlRefPointer<QQmlContextData> &ctxt, QObject *scope,
const QString &expression, const QString &fileName, quint16 line, quint16 column,
const QString &handlerName = QString(), const QString ¶meterString = QString());
QQmlBoundSignalExpression(
const QObject *target, int index, const QQmlRefPointer<QQmlContextData> &ctxt,
QObject *scopeObject, QV4::Function *function, QV4::ExecutionContext *scope = nullptr);
// inherited from QQmlJavaScriptExpression.
QString expressionIdentifier() const override;
void expressionChanged() override;
// evaluation of a bound signal expression doesn't return any value
void evaluate(void **a);
bool mustCaptureBindableProperty() const final {return true;}
QString expression() const;
const QObject *target() const { return m_target; }
private:
~QQmlBoundSignalExpression() override;
void init(const QQmlRefPointer<QQmlContextData> &ctxt, QObject *scope);
bool expressionFunctionValid() const { return function() != nullptr; }
int m_index;
const QObject *m_target;
};
class Q_QML_EXPORT QQmlBoundSignal : public QQmlNotifierEndpoint
{
public:
QQmlBoundSignal(QObject *target, int signal, QObject *owner, QQmlEngine *engine);
~QQmlBoundSignal();
void removeFromObject();
QQmlBoundSignalExpression *expression() const;
void takeExpression(QQmlBoundSignalExpression *);
void setEnabled(bool enabled);
private:
friend void QQmlBoundSignal_callback(QQmlNotifierEndpoint *, void **);
friend class QQmlPropertyPrivate;
friend class QQmlData;
friend class QQmlEngineDebugService;
void addToObject(QObject *owner);
QQmlBoundSignal **m_prevSignal;
QQmlBoundSignal *m_nextSignal;
bool m_enabled;
QQmlRefPointer<QQmlBoundSignalExpression> m_expression;
};
class QQmlPropertyObserver : public QPropertyObserver
{
public:
QQmlPropertyObserver(QQmlBoundSignalExpression *expr);
private:
QQmlRefPointer<QQmlBoundSignalExpression> expression;
};
QT_END_NAMESPACE
#endif // QQMLBOUNDSIGNAL_P_H
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